Decatur weather live forecast

Tomorrow's maximum temperature in Decatur is expected to be 70°F.

5-day weather forecast updated at 04:01 on Thursday 1st May 2025 GMT

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The 5-day weather forecast for Illinois (Decatur) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Decatur weather forecast by day

Below are the detailed weather forecasts for Decatur for the next 5 days.

Decatur weather for Thursday 1st May 2025

Expect isolated thunderstorms in Decatur, Illinois with a maximum temperature of 70°F, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 88% chance of some rain and a gentle breeze of 8 mph from the south-west.

  • 70°F maximum temperature70
    °F maximum temperature
  • 61°F minimum temperature61
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 88% chance of some rain88
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 70°F wind chill70
    °F wind chill
  • Gentle breeze of 8 mph from the South-West8
    mph wind from SW

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Decatur weather for Friday 2nd May 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 66°F, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 39% chance of some rain and a light breeze of 4 mph from the west.

  • 66°F maximum temperature66
    °F maximum temperature
  • 55°F minimum temperature55
    °F minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 39% chance of some rain39
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 4 mph from the West4
    mph wind from W

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Decatur weather for Saturday 3rd May 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 61°F, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 28% chance of some rain and a light breeze of 6 mph from the north.

  • 61°F maximum temperature61
    °F maximum temperature
  • 50°F minimum temperature50
    °F minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 28% chance of some rain28
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 61°F wind chill61
    °F wind chill
  • Light breeze of 6 mph from the North6
    mph wind from N

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Decatur weather for Sunday 4th May 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 64°F, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a light breeze of 6 mph from the north-east.

  • 64°F maximum temperature64
    °F maximum temperature
  • 46°F minimum temperature46
    °F minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 25% chance of some rain25
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 64°F wind chill64
    °F wind chill
  • Light breeze of 6 mph from the North-East6
    mph wind from NE

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Decatur weather for Monday 5th May 2025

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 64°F, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 11% chance of some rain and a light breeze of 5 mph from the north-east.

  • 64°F maximum temperature64
    °F maximum temperature
  • 48°F minimum temperature48
    °F minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 11% chance of some rain11
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 64°F wind chill64
    °F wind chill
  • Light breeze of 5 mph from the North-East5
    mph wind from NE

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